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M6 x 125mm Carbon Steel Hex Cap Screw

Expert Overview

This M6 x 125mm Hex Head Cap Screw, crafted from robust carbon steel, offers superior tensile strength and durability for demanding industrial fastening applications. Its large 30mm head width ensures excellent load distribution and ease of assembly.

StandardISO 9001
MaterialCarbon Steel
FinishGalvanized
GradeN/A
SizeM6
Length125mm
Head Width30mm

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this M6 x 125mm Hex Head Cap Screw is manufactured from high-grade carbon steel, providing exceptional tensile strength and resistance to deformation under load. The M6 thread conforms to international standards, ensuring compatibility with standard M6 nuts and tapped holes. With a generous 30mm head width, it facilitates secure tightening and distributes forces effectively across the joining surfaces. Its robust construction makes it ideal for heavy-duty machinery, structural assemblies, and critical infrastructure where reliability is paramount. Typical applications leverage its strength for dynamic load bearing and vibration resistance.

🧊 Download 3D CAD Model (.STEP)

Verified Global OEM Partners

This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.

BossardEst. 1831
Switzerland🇨🇭
"Global leader in fastening technology."
Market Rank
🏆 Top 3 Global Fastener Network
Industry Approvals
🚀 Aerospace & Tesla Approved
Warranty & Support
🛡️ Lifetime Traceability
Green Manufacturing
🌱 Carbon Neutral by 2030
Certified:ISO 9001, RoHS, REACH
Würth GroupEst. 1945
Germany🇩🇪
"Premium assembly and fastening materials."
Market Rank
🏆 #1 Global Assembly Supplier
Industry Approvals
🚀 VW & BMW OEM
Warranty & Support
🛡️ 5-Year Industrial Warranty
Green Manufacturing
🌱 100% Recyclable Packaging
Certified:ISO 9001, DIN EN
Brighton-BestEst. 1925
USA🇺🇸
"Master distributor of industrial fasteners."
Market Rank
🏆 Largest Distributor in NA
Industry Approvals
🚀 Boeing Approved
Warranty & Support
🛡️ Global Replacement Guarantee
Green Manufacturing
🌱 Green Steel Initiative
Certified:ISO 9001, A2LA

Certifications & Compliance

RoHS Compliant:Yes
REACH Compliant:Yes
Material Traceability:Available on Request
DFARS Compliant:Yes

Installation Procedure

1. Ensure mating threads are clean and free from debris. 2. Thread the cap screw by hand to prevent cross-threading. 3. Tighten using an appropriate wrench or socket to the specified torque value for M6 fasteners.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 898-1 / ISO 4014
DIN EquivalentDIN 931 / DIN 933
Primary StandardISO 9001

Mechanical Properties

Tensile StrengthStandard Commercial Spec
Yield StrengthStandard Commercial Spec
HardnessVaries by specific batch

Chemical Composition

Carbon (C)0.28 - 0.55%
Manganese (Mn)0.60 - 0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.05% max

Temperature & Environment Rating

Min Operating Temp
-20°F (-29°C)
Max Continuous Temp
400°F (204°C)
Thermal Expansion
Typical for Material Class

Recommended Torque Values

Bolt SizeDry Torque (ft-lbs)Lubricated Torque (ft-lbs)
M6Check CalculatorReduce by 25%

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
M6Varies by dimensionContact Sales

Corrosion Resistance Guide

EnvironmentRating
Indoor / DryExcellent
Outdoor / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using an undersized wrench or socket, leading to head damage and improper torque application.Always use a correctly sized wrench or socket that fits snugly onto the hex head to ensure full engagement and prevent stripping.
Applying excessive torque, which can lead to thread stripping or bolt fracture.Consult torque charts for M6 carbon steel fasteners and use a torque wrench for precise and consistent tightening.

Common Applications

  • Heavy Machinery Assembly
  • Structural Steel Connections
  • Automotive Components

⚠️ Engineering Warnings

  • Ensure the material strength of the mating components is sufficient to withstand the clamping force.
  • Protect threads from damage during handling and installation to maintain full engagement and achieve optimal clamping force.

Alternative Products to Consider

Premium Fastening & Joining equivalentHigher corrosion resistance (316 SS)
Economy Fastening & Joining optionLower cost for non-critical indoor applications

Frequently Asked Questions

Q: What is the Hex Head Cap Screw, Carbon Steel made from?

A: This Hex Head Cap Screw, Carbon Steel is manufactured from Carbon Steel.

Q: What are the main applications?

A: Heavy Machinery Assembly, Structural Steel Connections, Automotive Components.

Technical Schematic

HEX BOLT DIAGRAMSAE J429 / ASME B18.2.1HEXHEADLENGTH = 125mmAF30mm1/2"-13TIGHTEN →MECHANICAL PROPERTIESTensile Strength: 150,000 psiThread: 1/2"-13 UNCTorque Direction: Clockwise (CW)Head Marking: 6 radial lines (Grade 8)

Torque Specifications

⚡ UNIT CONVERTER

Conversion factor: 1 ft-lb ≈ 1.356 Nm

Verified Compatibility

StatusMating ComponentStandardTorque SpecEngineering Notes
No verified compatibility data found for this component.